YASKAWA iQpump Micro CIMR-PW Series User Manual page 261

LED Display LCD Display
oH
Cause
Surrounding temperature is too high
Load is too heavy
Internal cooling fan is stopped
LED Display LCD Display
oH1
Cause
Surrounding temperature is too high
Load is too heavy
The internal cooling fan has reached its
performance life or has malfunctioned.
Current flowing to control circuit terminal
+V exceeded the tolerance level.
LED Display LCD Display
oH4
Cause
Motor has overheated
LED Display LCD Display
oL1
Cause
Load is too heavy
Cycle times are too short during acceleration
and deceleration
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
Heatsink Overheat
oH
The heatsink temperature exceeded the overheat pre-alarm level set to L8-02.
• Check the temperature surrounding the drive. Verify temperature is within drive specifications.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
• Measure the output current.
• Decrease the load.
• Lower the carrier frequency (C6-02).
• Replace the cooling fan. .
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Overheat 1 (Heatsink Overheat)
oH1
The heatsink temperature exceeded the drive overheat level.
• Check the temperature surrounding the drive.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
• Measure the output current.
• Lower the carrier frequency (C6-02).
• Reduce the load.
• Check the maintenance time for the cooling fan (U4-04).
• If U4-04 exceeds 90%, replace the cooling fan.
• After replacing fan, reset the fan maintenance time (o4-03 = "0").
• Check the current level of the terminal.
• Set the current to the control circuit terminal to be 20 mA or less.
Motor Overheat Fault (PTC Input)
• The motor overheat signal to analog input terminal A1 or A2 exceeded the fault detection level.
oH4
• Detection requires setting multi-function analog inputs H3-02 or H3-10 to E.
• Check the size of the load, the accel/decel times, and the cycle times.
• Decrease the load.
• Increase the acceleration and deceleration times (C1-01 through C1-04).
• Adjust the preset V/f pattern (E1-04 through E1-10) by reducing E1-08 and E1-10.
• Do not set E1-08 and E1-10 too low. This reduces load tolerance at low speeds.
• Check the motor rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Motor Overload
oL1
The electronic motor overload protection tripped
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-04).
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
6.3 Fault Detection
6
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